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Fabrication and Characteristics of Fully-sprayed ZnO/CdS/CuInS2 Solar Cells
Tran Thanh Thai,Nguyen Duc Hieu,Luu Thi Lan Anh,Pham Phi Hung,Vo Thach Son,Vu Thi Bich 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.9
This paper reports the successful fabrication of deposited Glass/ZnO/CdS/CuInS<sub>2</sub> solar cells with superstrate structure using Full Spray Pyrolysis Deposition (FSPD). The structure, optical and electrical properties of the constituent layers are investigated. It is observed that the CuInS<sub>2</sub> (CIS) film deposited from starting solution with [Cu]/[In] = 1.1, and Al-doped CuInS<sub>2</sub> (CIAS) film deposited from solution with [Cu]/[In] = 1.0, [Al]/[In] = 0.12, and using sulfurization process exhibited the best crystallites with tetragonal structure. The optical band gap of the CIAS film is obtained as 1.49 eV. Some physical properties of both ZnO, and CdS thin films are also studied. The parameters of the cells obtained are V<sub>OC</sub> = 425 mV, J<sub>SC</sub> = 14.02 mA/cm<sup>2</sup>, FF = 28.75% and efficiency of 1.71%. The results in our experiment show that FSPD is a potential technique to prepare solar cells based on CIS absorbers in a superstrate structure with low cost and high performance.